I've had the second pivot for a few months now and have another on the way for my spare arm wand. It's easy to hear the difference and if you don't like what you hear it's easily removed.
VPI 2nd Pivot for 3D
I just installed mine and discovering my old records anew. I thought I knew everything there was to know on the original pressing of Fleetwood Mac's Rumers......but no - there's more. You immediately hear a more solid bass, but then the dynamics hit hard. It sounds like my amp is on steroids. More cleanliness, - everything is better. Very highly recommended.